Characteristics and Application of Spring-type Hot Runner Thermocouples

With an integrated elastic compression construction, spring-type thermocouples are a unique elastic contact temperature measuring device specifically made for hot runners. They are frequently utilized in nozzle heating sleeves and readily movable temperature measuring sites.

The integrated spring compression design is its most notable feature. It can rely on elastic force to maintain the probe's constant tight pressure against the measured surface after installation. It can automatically compensate for assembly gaps and consistently maintain an exceptional close contact condition, completely resolving temperature lag and deviation caused by loose contact, even under prolonged high-temperature thermal deformation and equipment vibration.

There are no stringent assembly depth tolerance requirements for spring-type goods, which makes installation easier. They are ideal for molds with slightly different reserved hole positions because they have a high fault tolerance rate, minimal assembly complexity, and the ability to automatically change compression stroke during installation.

They are typically matched with split combined manifolds, hot runner nozzle heating sleeves, and regularly dismantled mold structures in real-world application settings. In high-vibration work situations, they are able to maintain consistent temperature measurement accuracy. However, compared to solid integrated varieties, these thermocouples are less durable at high temperatures because of their intricate internal elastic structure, and after prolonged high-temperature baking, the elastic components quickly lose their elasticity, weakening the compression effect.

Therefore, solid fixed thermocouples are still more dependable for long-term steady high-temperature working locations, whereas spring-type thermocouples are chosen for situations needing automatic gap compensation.